Cuba is known for having relatively large stretches of pristine mangrove forests and undisturbed coral reefs, beaches, and sea grass marshes. Satellite photo by NASA Earth observatory.

Friday, 31 October 2014

Research Suggests Our Past, Prolific Use Of The Insecticide DDT May Still Be Contributing To A Scourge Of Modern-Day Diseases Related To Obesity.

Is a world-wide ban now the only ethical thing to do?

by Larry Powell

Did your parents farm In Canada
in the years following World War 11, as
mine did? If so, little would they have dreamed of the health dangers lurking
withinthe popular chemical, DDT, which they might well have been
spraying on their fields.

But DDT was banned in North America in the 70’s after Rachel Carson exposed
it in her book,“Silent Spring” as the
culprit in massive die-offs of birds and fish and as a “definite chemical carcinogen.”

DDT made a significant
resurgence in the early 2000’s, however. That’s when the Bill and Melinda Gates
Foundation and the World Health Organization began promoting programs to
control malaria, notably in Sub-Saharan Africa.DDT
is sprayed indoors and used to treat bed nets to protect people from malaria
mosquitoes. It is now estimated up to 5 thousand tonnes are applied yearly.

But the degree to which DDT can harm not only those directly
exposed, but their offspring several generations later, has only recently become
better understood.

In experiments with laboratory rats, the team
discovered that the chemical seems to have the ability to cause serious ailments
related to obesity (metabolic disease)
in offspring born to parents directly
exposed, even though those offspring had
no such exposure, themselves. They include diabetes,
diseases of the liver, kidney, heart and reproductive organs, male infertility
and a shorter life.

DDT
thus joins a growing list of substances such as jet fuel and dioxins with the
same dubious ability.

So
the researchers now believe that, while diet and lifestyle are playing a role, the DDT applied during its heyday, too, is still
contributing to the deadly epidemic of obesity that has been sweeping this
continent for years.

“No known genetic mechanism could explain the
rapid increase in the incidence of obesity in the last 30 years,” observes the
WSU study.

Queens University in
Ontario
estimates that 57 thousand Canadians died of obesity-related ailments between
1985 and 2,000. And Memorial University in Newfoundland has
concluded that obesity rates “tripled between 1985 and 2011.”

A
biology teacher at WSU, Michael Skinner (left), headed that study. In an e-mail to PinP, Dr.
Skinner confidently defends his team’s research results.

“In
the 40s and 50s, all of North America and the entire population was exposed to
DDT. We are now three generations from the 1950s, when the obesity metabolic
disease frequency was around 5% and today is near 40% of the population. So,
yes, some of the disease today is due to these ancestral exposures.”

Some researchers now believe DDT should be banned, worldwide.

This summer, WSU did a follow-up study, this
time with unusual input from the
its School of Philosophy. It examined
the ethical and moral implications of
DDT’s continued use, in the wake of last year’s disturbing revelations. “Current day exposures need to now be considered
in light of the transgenerational actions of DDT,” the team concludes. As
Prof. Skinner puts it, a worldwide ban is now a matter of “environmental
justice. There are alternatives with shorter half-lives that need to be
considered.”

But convincing the world that a total ban is needed,
may not be easy.

In 2009, the Annual Review of Entomologyreported that, after some two decades
of DDT application, the death rate
from malaria had plummeted. In 1900, it was claiming more than 19 lives per
ten thousand population; in 1970, fewer
than two. The Review calls that “a massive reduction.” And the Gates
Foundation claims its
program has helped reduce the death toll from malaria by more than 40 percent
over the past dozen years or so.

But the WSU ethics paper poses some convincing
arguments of its own; Health implications uncovered by the recent research are endangering individuals "who are not able to have any
voice in the decision to use the pesticide." So we must now balance the number of lives being saved from
malaria, against the implications that its continued usage will surely have. “There are now many accounts of socially
disadvantaged, ethnic groups and the poor, suffering the ill effects of
environmental degradation,” states the report. “DDT use in the developing world looks set to be yet another case in
that sad history. The harm will only fully emerge over the course of a number
of generations.”

The report concludes that the burden of proof must
now shift back to those advocating for its continued use. And the worst thing that could happen would be to
carry on with the status quo without careful consideration of the consequences.

-30-Postscript: I asked the Gates Foundation and the World Health Organization for comments on this some time ago. I am still waiting for their responses.---------

In a future chapter, Larry will explore this.Is there a new DDT on the horizon?

Stay tuned!(This article is also posted on "OpEd News," where it drew about a dozen comments! Please read them here.)